Harrow International School Bangkok (Harrow)

Founded in 1998 as the first Harrow-branded school outside the UK, HISB operates on a spacious campus in Don Mueang with boarding facilities and serves 36 nationalities. The school follows the British curriculum through IGCSEs and A-Levels, achieving 65% A/A grades at IGCSE level and 87% A/A at the school average. With 100% university progression rates and connections to the wider Harrow network, it maintains academic prestige within Bangkok's competitive international education market.

Teacher feedback presents a complex picture of life at the school. While some praise the quality of students and colleagues, multiple educators describe unsustainable workloads including early morning starts, late evening commitments, and extensive additional responsibilities without compensation. The school's emphasis on staff living on campus and going 'above and beyond' appears to create challenges for work-life balance. Leadership style has drawn criticism, with mentions of micromanagement and a formal, traditional British school culture that some find restrictive.

Strengths

• Strong academic results with 65% A*/A grades at IGCSE level
• Prestigious Harrow brand recognition and global network connections
• 100% university progression rate with dedicated counselling support
• Spacious campus with boarding facilities in Don Mueang
• Serves diverse student body representing 36 nationalities
• Quality students and teaching colleagues according to staff feedback

Considerations

• Teacher reports of poor work-life balance and unsustainable workloads
• Micromanagement concerns and formal British school culture
• Required on-campus living for some staff positions
• Expectations for extensive unpaid additional duties and responsibilities
• Location in Don Mueang may be inconvenient for some families
• High staff turnover with many leaving after short contracts

Academics

• A Level Results (2025): 70% A -A, 90% A -B (Official Website) - IGCSE Results (2025): 71% A -A, 92% A -B (Official Website) - 2024 University Destinations: 91% secured first-choice university, 13% to QS Top 10 institutions; destinations include Stanford, Oxford, Imperial College London, University of Melbourne (University Destinations 2024) - IB Average Score: Not published (School follows A Level curriculum) - IB Pass Rate: Not published - Percentage scoring 40+ IB: Not published - AP Pass Rates: Not published. Ask the school for the latest academic results details for your child's year group.

School life

• Sports: Over 50 different sports activities; 5 dedicated sports academies (Sports) - Arts & Music: Over 40 music activities; individual specialist lessons; drawing, painting, ceramics, textiles, photography; graphic design; F1 in Schools (Creative and Performing Arts) - Other Programs: Leadership in Action, Duke of Edinburgh's International Award, community service, expeditions, entrepreneurship, Eco Code (Co-Curricular) - Notable Achievements: Competes in BISAC, FOBISIA, and SEASAC (Sports). Ask the school for the latest activities details for your child's year group.

• Campus Size: 35 acres (Campus Facilities) - Swimming Pool: 8-lane, 25m salt-chlorinated pool (Sports) - Sports Facilities: Double air-conditioned sports hall, shaded multi-purpose outdoor courts (60m track, 2 basketball, 3 volleyball), 3 senior grass football pitches, 2 junior and 2 floodlit pitches, rugby pitch, fitness suite, 6 floodlit tennis courts, gymnastics room, climbing wall (Sports) - Arts & Science: Creative and Performing Arts Centre (design & technology workshops, graphic design centre, photography studios), music centre with practice rooms, art studios, science and technology labs (Campus Facilities) - Other: Boarding village with 4 houses and 'The Hub' (dining, medical, laundry), Rayleigh Centre, Kopse Cafe, Sixth Form Cafe, library (Campus Facilities). Ask the school for the latest facilities details for your child's year group.

Student body

• Total Enrolment: 1,846 (as of 2024-2025 profile) (School Profile 2024-2025) - Number of Nationalities: 36 (School Profile 2024-2025) - Student-Teacher Ratio: 1:3 in Toddlers, 1:5 in Pre-Nursery, 1:7 in Nursery and Reception (FAQs) - Average Class Size: Infants (max 20), Juniors (max 22), Prep/Year 9 (avg 18, max 24), IGCSE (avg 16, max 22), A Level (avg 8, max 15) (FAQs) - Age/Grade Range: 18 months to 18 years (Official Website) - Demographic breakdown: 254 Early Years, 538 Pre Prep, 417 Prep, 637 Senior School (School Profile 2024-2025). Ask the school for the latest student body details for your child's year group.

• Harrow Bangkok is the original Harrow international campus and is consistently named in teacher-forum lists alongside the most established British schools in Asia. Multiple commenters say they would actively work there.
• The cohort sits at around 1,500 to 1,600 pupils across more than 35 nationalities on a 35-acre site. The published positioning is breadth rather than "hot housing"; A Level results and IGCSE outcomes are reliably strong.
• Parent reviews on aggregator pages describe care from teachers, pupils settling quickly, an extensive co-curricular programme, and excellent facilities. One parent on Expat Exchange said children are "happy being in the school" with "lovely friends."
• Teacher-side signal is more mixed. Glassdoor shows around 2.8 of 5 across the group with Harrow Bangkok flagged for work-life balance; ISR forum posts have flagged glowing reviews that look astroturfed.
• A persistent thread on the school's continuous job advertisements, particularly in subject leadership, is treated by some commenters as a turnover signal worth probing during interview.
• Reviewers also note the cohort is largely Thai. That is the school's reality and not a flaw, but families looking for a heavily mixed international cohort should weight it.